2m/144MHz LFA Yagis

The LFA ("Loop Fed Array") has a rectangular dipole with 1λ length. The dipole lies flat on the boom at the same level as the parasitic elements. The outer sides of the dipole run parallel to the boom and are designed to be exactly inversely phased (±180°).

This way signals eliminate each other on those sides resulting in much reduced side lobes, lower G/T values and a better front to back ratio.
This concept can be applied at almost any boom length. LFA Yagis have 50Ω impedance and get by without lossy transformation.

Cross Yagi (LFA) for 2m

16+16 LFA

Our 2m, 2x16ele LFA crossed yagi attached to a 13m dish at the EME 2014 conference in Pleumeur-Bodou (France). After the QSOs it was a gift and the first prize of a lotery among all attendants of the conference.

50MHz/70MHz/144MHz directional antenna

Cover 3 VHF-bands with only one antenna. All elements are at same level on a common boom. The gaps between elements are design to produce high gain as well as very good F/B ratio. The antenna, built in DK7ZB-design, has a light weighted so that even low-priced TV antenna rotors can turn it without any problems.